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This study experimentally investigates gender quotas in light of peer review. We investigate competitions with and without gender quotas and a peer review process that allows for sabotage. Our findings show that the possibility of peer sabotage renders the gender quota ineffective in encouraging women to enter tournaments. Moreover, we provide evidence of a severe backlash against women, as they become targets of sabotage under gender quotas. Interestingly, this is the result of women focusing on sabotaging each other while men sabotage indiscriminately. Our results have implications for the use of quotas to mitigate the underrepresentation and underperformance of minority groups in environments in which peer sabotage is possible. Data and the online appendix are available at https://doi.org/10.1287/mnsc.2017.2772 . This paper was accepted by Uri Gneezy, behavioral economics.

This is the author's version of the article:"Teaching Business in Tanzania: Evaluating Participation and Performance" Journal of the European Economic Association, Volume 8, Issue 2-3, pages 561–570, April-May 2010. There is increased awareness that success among small-scale entrepreneurs in developing countries requires more than microfinance, and that an important limiting factor for business growth is the level of human capital among the entrepreneurs. The present paper uses a randomized control trial to evaluate a business training program in Tanzania. Our results show that there is a positive average treatment effect on business knowledge. It also appears that training has a stronger effect on the entrepreneurs with less formal education. Paradoxically, these entrepreneurs are also less consistent in their participation in the training program. An important implication from our study is therefore that when providing business training, special care should be given to ensure high participation rates.